package com.qk.management.web.filter;

import cn.hutool.core.util.ObjectUtil;
import com.qk.common.util.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;

/**
 * @Author: chouh
 * @DateTime: 2025/10/11 10:59
 * @Description: 登录检查过滤器
 */
@Slf4j
@WebFilter("/*")
public class LoginCheckFilter implements Filter {

    private static final String LOGIN_PATH = "/login";
    private static final String TOKEN_HEADER_NAME = "token";

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException{
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;

        String path = request.getRequestURI();
        log.info("intercepted path: {}", path);

        boolean isLoginReq = ObjectUtil.equal(LOGIN_PATH, path);
        if (isLoginReq) {
            chain.doFilter(request, response);
            return;
        }
        String token = request.getHeader(TOKEN_HEADER_NAME);
        if (ObjectUtil.isEmpty(token)) {
            response.setStatus(401);
            return;
        }
        try {
            Claims claims = JwtUtil.parseToken(token);
            String id = claims.getId();
            log.info("userId: {}", id);
            String username = claims.get("username", String.class);
            log.info("username: {}", username);
            chain.doFilter(request,response);
        } catch (Exception e) {
            log.error("token error: {}", e.getMessage());
        }
    }
}
